Service riser
US6237963A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 4, 1998 |
| Grant date | May 29, 2001 |
| Priority date | — |
| Expiry date | Dec 4, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L33/00
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A service riser 10 comprises a steel jacket 11 around a polyethylene pipe 12 which terminates in the riser at a transition zone 20. The transition zone 20 comprises a retainer sleeve 30 inserted in the end of the pipe 12 and sealed thereto by an O-ring 38. The retainer sleeve 30 extends out of the pipe 12 and is provided with grooves 46 separated by lands 48 on which an elastomeric sealing band 52 is received. The tube 11 is swaged down forming a swage groove 56 around the retainer sleeve 30 compressing the gasket 52 to a large extent over the lands 48 and a lesser extent over the grooves 46, the ideal compression for the gasket 52 being arranged somewhere between such degrees of compression. By this means the ideal degree of compression at some regions of the gasket 52, forming an annulus around the retainer sleeve 30, is guaranteed, despite tolerances in the dimensions of the tube 11 (especially) as well as the band 52 and sleeve 30.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.